[proxmark3-svn] / client / cmdhftopaz.c

//-----------------------------------------------------------------------------
// Copyright (C) 2015 Piwi
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// High frequency Topaz (NFC Type 1) commands
//-----------------------------------------------------------------------------

#include "cmdhftopaz.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "cmdmain.h"
#include "cmdparser.h"
#include "cmdhf14a.h"
#include "ui.h"
#include "mifare.h"
#include "comms.h"
#include "iso14443crc.h"
#include "protocols.h"

#define TOPAZ_STATIC_MEMORY	(0x0f * 8)		// 15 blocks with 8 Bytes each

// a struct to describe a memory area which contains lock bits and the corresponding lockable memory area
typedef struct dynamic_lock_area {
	struct dynamic_lock_area *next;
	uint16_t	byte_offset;			// the address of the lock bits
	uint16_t	size_in_bits;
	uint16_t	first_locked_byte;		// the address of the lockable area
	uint16_t	bytes_locked_per_bit;
} dynamic_lock_area_t;


static struct {
	uint8_t HR01[2];
	uint8_t uid[7];
	uint16_t size;
	uint8_t data_blocks[TOPAZ_STATIC_MEMORY/8][8];	// this memory is always there
	uint8_t *dynamic_memory;						// this memory can be there
	dynamic_lock_area_t *dynamic_lock_areas;		// lock area descriptors
} topaz_tag;


static void topaz_switch_on_field(void)
{
	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_CONNECT | ISO14A_NO_SELECT | ISO14A_NO_DISCONNECT | ISO14A_TOPAZMODE, 0, 0}};
	SendCommand(&c);
}


static void topaz_switch_off_field(void)
{
	UsbCommand c = {CMD_READER_ISO_14443a, {0, 0, 0}};
	SendCommand(&c);
}


// send a raw topaz command, returns the length of the response (0 in case of error)
static int topaz_send_cmd_raw(uint8_t *cmd, uint8_t len, uint8_t *response)
{
	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_RAW | ISO14A_NO_DISCONNECT | ISO14A_TOPAZMODE, len, 0}};
	memcpy(c.d.asBytes, cmd, len);
	SendCommand(&c);

	UsbCommand resp;
	WaitForResponse(CMD_ACK, &resp);

	if (resp.arg[0] > 0) {
		memcpy(response, resp.d.asBytes, resp.arg[0]);
	}
	
	return resp.arg[0];
}


// calculate CRC bytes and send topaz command, returns the length of the response (0 in case of error) 
static int topaz_send_cmd(uint8_t *cmd, uint8_t len, uint8_t *response)
{
	if (len > 1) {
        uint8_t first, second;
		ComputeCrc14443(CRC_14443_B, cmd, len-2, &first, &second);
        cmd[len-2] = first;
        cmd[len-1] = second;
	}

	return topaz_send_cmd_raw(cmd, len, response);
}


// select a topaz tag. Send WUPA and RID.
static int topaz_select(uint8_t *atqa, uint8_t *rid_response)
{
	// ToDo: implement anticollision

	uint8_t wupa_cmd[] = {TOPAZ_WUPA};
	uint8_t rid_cmd[] = {TOPAZ_RID, 0, 0, 0, 0, 0, 0, 0, 0};

	topaz_switch_on_field();

	if (!topaz_send_cmd(wupa_cmd, sizeof(wupa_cmd), atqa)) {
		topaz_switch_off_field();
		return -1;		// WUPA failed
	}

	if (!topaz_send_cmd(rid_cmd, sizeof(rid_cmd), rid_response)) {
		topaz_switch_off_field();
		return -2;		// RID failed
	}
	
	return 0;		// OK
}


// read all of the static memory of a selected Topaz tag.
static int topaz_rall(uint8_t *uid, uint8_t *response)
{
	uint8_t rall_cmd[] = {TOPAZ_RALL, 0, 0, 0, 0, 0, 0, 0, 0};

	memcpy(&rall_cmd[3], uid, 4);
	if (!topaz_send_cmd(rall_cmd, sizeof(rall_cmd), response)) {
		topaz_switch_off_field();
		return -1;		// RALL failed
	}
	
	return 0;
}


// read a block (8 Bytes) of a selected Topaz tag.
static int topaz_read_block(uint8_t *uid, uint8_t blockno, uint8_t *block_data)
{
	uint8_t read8_cmd[] = {TOPAZ_READ8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	uint8_t read8_response[11];
	
	read8_cmd[1] = blockno;
	memcpy(&read8_cmd[10], uid, 4);
	if (!topaz_send_cmd(read8_cmd, sizeof(read8_cmd), read8_response)) {
		topaz_switch_off_field();
		return -1;		// READ8 failed
	}
	
	memcpy(block_data, &read8_response[1], 8);
	
	return 0;
}


// read a segment (16 blocks = 128 Bytes) of a selected Topaz tag. Works only for tags with dynamic memory.
static int topaz_read_segment(uint8_t *uid, uint8_t segno, uint8_t *segment_data)
{
	uint8_t rseg_cmd[] = {TOPAZ_RSEG, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	uint8_t rseg_response[131];
	
	rseg_cmd[1] = segno << 4;
	memcpy(&rseg_cmd[10], uid, 4);
	if (!topaz_send_cmd(rseg_cmd, sizeof(rseg_cmd), rseg_response)) {
		topaz_switch_off_field();
		return -1;		// RSEG failed
	}
	
	memcpy(segment_data, &rseg_response[1], 128);
	
	return 0;
}


// search for the lock area descriptor for the lockable area including byteno 
static dynamic_lock_area_t *get_dynamic_lock_area(uint16_t byteno)
{
	dynamic_lock_area_t *lock_area;
	
	lock_area = topaz_tag.dynamic_lock_areas;
	
	while (lock_area != NULL) {
		if (byteno < lock_area->first_locked_byte) {
			lock_area = lock_area->next;
		} else {
			return lock_area;
		}
	}

	return NULL;
}


// check if a memory byte is locked.
static bool topaz_byte_is_locked(uint16_t byteno)
{
	uint8_t *lockbits;
	uint16_t locked_bytes_per_bit;
	dynamic_lock_area_t *lock_area;
	
	if (byteno < TOPAZ_STATIC_MEMORY) {
		lockbits = &topaz_tag.data_blocks[0x0e][0];
		locked_bytes_per_bit = 8;
	} else {
		lock_area = get_dynamic_lock_area(byteno);
		if (lock_area == NULL) {
			return false;
		} else {
			lockbits = &topaz_tag.dynamic_memory[lock_area->byte_offset - TOPAZ_STATIC_MEMORY];
			locked_bytes_per_bit = lock_area->bytes_locked_per_bit;
			byteno = byteno - lock_area->first_locked_byte;
		}
	}

	uint16_t blockno = byteno / locked_bytes_per_bit;
	if(lockbits[blockno/8] & (0x01 << (blockno % 8))) {
		return true;
	} else {
		return false;
	}
}


// read and print the Capability Container
static int topaz_print_CC(uint8_t *data)
{
	if(data[0] != 0xe1) {
		topaz_tag.size = TOPAZ_STATIC_MEMORY;
		return -1;		// no NDEF message
	}

	PrintAndLog("Capability Container: %02x %02x %02x %02x", data[0], data[1], data[2], data[3]);
	PrintAndLog("  %02x: NDEF Magic Number", data[0]); 
	PrintAndLog("  %02x: version %d.%d supported by tag", data[1], (data[1] & 0xF0) >> 4, data[1] & 0x0f);
	uint16_t memsize = (data[2] + 1) * 8;
	topaz_tag.size = memsize;
	topaz_tag.dynamic_memory = malloc(memsize - TOPAZ_STATIC_MEMORY);
	PrintAndLog("  %02x: Physical Memory Size of this tag: %d bytes", data[2], memsize);
	PrintAndLog("  %02x: %s / %s", data[3], 
				(data[3] & 0xF0) ? "(RFU)" : "Read access granted without any security", 
				(data[3] & 0x0F)==0 ? "Write access granted without any security" : (data[3] & 0x0F)==0x0F ? "No write access granted at all" : "(RFU)");
	return 0;				
}


// return type, length and value of a TLV, starting at memory position *TLV_ptr 
static void get_TLV(uint8_t **TLV_ptr, uint8_t *TLV_type, uint16_t *TLV_length, uint8_t **TLV_value)
{
	*TLV_length = 0;
	*TLV_value = NULL;

	*TLV_type = **TLV_ptr;
	*TLV_ptr += 1;
	switch (*TLV_type) {
		case 0x00:			// NULL TLV.
		case 0xFE:			// Terminator TLV.
			break;
		case 0x01:			// Lock Control TLV
		case 0x02:			// Reserved Memory TLV
		case 0x03:			// NDEF message TLV
		case 0xFD:			// proprietary TLV
			*TLV_length = **TLV_ptr;
			*TLV_ptr += 1;
			if (*TLV_length == 0xff) {
				*TLV_length = **TLV_ptr << 8;
				*TLV_ptr += 1;
				*TLV_length |= **TLV_ptr;
				*TLV_ptr += 1;
			}
			*TLV_value = *TLV_ptr;
			*TLV_ptr += *TLV_length;
			break;
		default:			// RFU
			break;
	}
}


// lock area TLVs contain no information on the start of the respective lockable area. Lockable areas
// do not include the lock bits and reserved memory. We therefore need to adjust the start of the 
// respective lockable areas accordingly
static void adjust_lock_areas(uint16_t block_start, uint16_t block_size)
{
	dynamic_lock_area_t *lock_area = topaz_tag.dynamic_lock_areas;
	while (lock_area != NULL) {
		if (lock_area->first_locked_byte <= block_start) {
			lock_area->first_locked_byte += block_size;
		}
		lock_area = lock_area->next;
	}
}


// read and print the lock area and reserved memory TLVs
static void topaz_print_control_TLVs(uint8_t *memory)
{
	uint8_t *TLV_ptr = memory;
	uint8_t TLV_type = 0;
	uint16_t TLV_length;
	uint8_t *TLV_value;
	bool lock_TLV_present = false;
	bool reserved_memory_control_TLV_present = false;
	uint16_t next_lockable_byte = 0x0f * 8;				// first byte after static memory area
	
	while(*TLV_ptr != 0x03 && *TLV_ptr != 0xFD && *TLV_ptr != 0xFE) {	
		// all Lock Control TLVs shall be present before the NDEF message TLV, the proprietary TLV (and the Terminator TLV)
		get_TLV(&TLV_ptr, &TLV_type, &TLV_length, &TLV_value);
		if (TLV_type == 0x01) {			// a Lock Control TLV
			uint8_t pages_addr = TLV_value[0] >> 4;
			uint8_t byte_offset = TLV_value[0] & 0x0f;
			uint16_t size_in_bits = TLV_value[1] ? TLV_value[1] : 256;
			uint16_t size_in_bytes = (size_in_bits + 7)/8;
			uint16_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
			uint16_t bytes_locked_per_bit = 1 << (TLV_value[2] >> 4);
			uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
			PrintAndLog("Lock Area of %d bits at byte offset 0x%04x. Each Lock Bit locks %d bytes.", 
						size_in_bits,
						area_start,
						bytes_locked_per_bit);
			lock_TLV_present = true;
			dynamic_lock_area_t *old = topaz_tag.dynamic_lock_areas;
			dynamic_lock_area_t *new = topaz_tag.dynamic_lock_areas;
			if (old == NULL) {
				new = topaz_tag.dynamic_lock_areas = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
			} else {
				while(old->next != NULL) {
					old = old->next;
				}
				new = old->next = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
			}
			new->next = NULL;
			if (area_start <= next_lockable_byte) {
				// lock areas are not lockable
				next_lockable_byte += size_in_bytes;
			}
			new->first_locked_byte = next_lockable_byte;
			new->byte_offset = area_start;
			new->size_in_bits = size_in_bits;
			new->bytes_locked_per_bit = bytes_locked_per_bit;
			next_lockable_byte += size_in_bits * bytes_locked_per_bit;		
		}
		if (TLV_type == 0x02) {			// a Reserved Memory Control TLV
			uint8_t pages_addr = TLV_value[0] >> 4;
			uint8_t byte_offset = TLV_value[0] & 0x0f;
			uint16_t size_in_bytes = TLV_value[1] ? TLV_value[1] : 256;
			uint8_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
			uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
			PrintAndLog("Reserved Memory of %d bytes at byte offset 0x%02x.", 
						size_in_bytes,
						area_start);
			reserved_memory_control_TLV_present = true;
			adjust_lock_areas(area_start, size_in_bytes);  // reserved memory areas are not lockable
			if (area_start <= next_lockable_byte) {
				next_lockable_byte += size_in_bytes;
			}
		}
	}
	
	if (!lock_TLV_present) {
		PrintAndLog("(No Lock Control TLV present)");
	}
	
	if (!reserved_memory_control_TLV_present) {
		PrintAndLog("(No Reserved Memory Control TLV present)");
	}	
}


// read all of the dynamic memory
static int topaz_read_dynamic_data(void)
{
	// first read the remaining block of segment 0
	if(topaz_read_block(topaz_tag.uid, 0x0f, &topaz_tag.dynamic_memory[0]) == -1) {
		PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
		return -1;
	}
	
	// read the remaining segments
	uint8_t max_segment = topaz_tag.size / 128 - 1;
	for(uint8_t segment = 1; segment <= max_segment; segment++) {
		if(topaz_read_segment(topaz_tag.uid, segment, &topaz_tag.dynamic_memory[(segment-1)*128+8]) == -1) {
			PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
			return -1;
		}
	}
	
	return 0;
}
	

// read and print the dynamic memory
static void topaz_print_dynamic_data(void)
{
	if (topaz_tag.size > TOPAZ_STATIC_MEMORY) {
		PrintAndLog("Dynamic Data blocks:");
		if (topaz_read_dynamic_data() == 0) {
			PrintAndLog("block# | offset | Data                    | Locked(y/n)");
			char line[80];
			for (uint16_t blockno = 0x0f; blockno < topaz_tag.size/8; blockno++) {
				uint8_t *block_data = &topaz_tag.dynamic_memory[(blockno-0x0f)*8];
				char lockbits[9];
				for (uint16_t j = 0; j < 8; j++) {
					sprintf(&line[3*j], "%02x ", block_data[j]);
					lockbits[j] = topaz_byte_is_locked(blockno*8+j) ? 'y' : 'n';
				}
				lockbits[8] = '\0';
				PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", blockno, blockno*8, line, lockbits);
			}
		}
	}
}


static void topaz_print_lifecycle_state(uint8_t *data)
{
	// to be done
}


static void topaz_print_NDEF(uint8_t *data)
{
	// to be done. 
}


// read a Topaz tag and print some usefull information	
int CmdHFTopazReader(const char *Cmd)
{
	int status;
	uint8_t atqa[2];
	uint8_t rid_response[8];
	uint8_t *uid_echo = &rid_response[2];
	uint8_t rall_response[124];
	
	status = topaz_select(atqa, rid_response);
	
	if (status == -1) {
		PrintAndLog("Error: couldn't receive ATQA");
		return -1;
	}

	PrintAndLog("ATQA : %02x %02x", atqa[1], atqa[0]);
	if (atqa[1] != 0x0c && atqa[0] != 0x00) {
		PrintAndLog("Tag doesn't support the Topaz protocol.");
		topaz_switch_off_field();
		return -1;
	}
	
	if (status == -2) {
		PrintAndLog("Error: tag didn't answer to RID");
		topaz_switch_off_field();
		return -1;
	}

	topaz_tag.HR01[0] = rid_response[0];
	topaz_tag.HR01[1] = rid_response[1];
	
	// ToDo: CRC check
	PrintAndLog("HR0  : %02x (%sa Topaz tag (%scapable of carrying a NDEF message), %s memory map)", rid_response[0], 
						(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
						(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
						(rid_response[0] & 0x0F) == 0x01 ? "static" : "dynamic");
	PrintAndLog("HR1  : %02x", rid_response[1]);
	
	status = topaz_rall(uid_echo, rall_response);

	if(status == -1) {
		PrintAndLog("Error: tag didn't answer to RALL");
		topaz_switch_off_field();
		return -1;
	}

	memcpy(topaz_tag.uid, rall_response+2, 7);
	PrintAndLog("UID  : %02x %02x %02x %02x %02x %02x %02x", 
			topaz_tag.uid[6], 
			topaz_tag.uid[5], 
			topaz_tag.uid[4], 
			topaz_tag.uid[3], 
			topaz_tag.uid[2], 
			topaz_tag.uid[1], 
			topaz_tag.uid[0]);
	PrintAndLog("       UID[6] (Manufacturer Byte) = %02x, Manufacturer: %s", 
			topaz_tag.uid[6], 
			getTagInfo(topaz_tag.uid[6]));

	memcpy(topaz_tag.data_blocks, rall_response+2, 0x0f*8);
	PrintAndLog("");
	PrintAndLog("Static Data blocks 00 to 0c:");
	PrintAndLog("block# | offset | Data                    | Locked(y/n)");
	char line[80];
	for (uint16_t i = 0; i <= 0x0c; i++) {
		char lockbits[9];
		for (uint16_t j = 0; j < 8; j++) {
			sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[i][j] /*rall_response[2 + 8*i + j]*/);
			lockbits[j] = topaz_byte_is_locked(i*8+j) ? 'y' : 'n';
		}
		lockbits[8] = '\0';
		PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", i, i*8, line, lockbits);
	}
	
	PrintAndLog("");
	PrintAndLog("Static Reserved block 0d:");
	for (uint16_t j = 0; j < 8; j++) {
		sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0d][j]);
	}
	PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", 0x0d, 0x0d*8, line, "n/a");
	
	PrintAndLog("");
	PrintAndLog("Static Lockbits and OTP Bytes:");
	for (uint16_t j = 0; j < 8; j++) {
		sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0e][j]);
	}
	PrintAndLog("  0x%02x | 0x%04x | %s|   %-3s", 0x0e, 0x0e*8, line, "n/a");

	PrintAndLog("");

	status = topaz_print_CC(&topaz_tag.data_blocks[1][0]);
	
	if (status == -1) {
		PrintAndLog("No NDEF message data present");
		topaz_switch_off_field();
		return 0;
	}

	PrintAndLog("");
	topaz_print_control_TLVs(&topaz_tag.data_blocks[1][4]);

	PrintAndLog("");
	topaz_print_dynamic_data();
	
	topaz_print_lifecycle_state(&topaz_tag.data_blocks[1][0]);

	topaz_print_NDEF(&topaz_tag.data_blocks[1][0]);
	
	topaz_switch_off_field();
	return 0;
}


int CmdHFTopazCmdRaw(const char *Cmd)
{
	PrintAndLog("not yet implemented. Use hf 14 raw with option -T.");
	return 0;
}


static int CmdHelp(const char *Cmd);


static command_t CommandTable[] = 
{
	{"help",	CmdHelp,			1, "This help"},
	{"reader",	CmdHFTopazReader,	0, "Act like a Topaz reader"},
	{"snoop",	CmdHF14ASnoop,		0, "Eavesdrop a Topaz reader-tag communication"},
	{"raw",		CmdHFTopazCmdRaw,	0, "Send raw hex data to tag"},
	{NULL,		NULL,				0, NULL}
};


int CmdHFTopaz(const char *Cmd) {
	(void)WaitForResponseTimeout(CMD_ACK,NULL,100);
	CmdsParse(CommandTable, Cmd);
	return 0;
}


static int CmdHelp(const char *Cmd)
{
	CmdsHelp(CommandTable);
	return 0;
}
Commit	Line	Data
05ddb52c	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2015 Piwi
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// High frequency Topaz (NFC Type 1) commands
	9	//-----------------------------------------------------------------------------
	10
ad939de5	11	#include "cmdhftopaz.h"
ad939de5	12
05ddb52c	13	#include <stdio.h>
	14	#include <stdlib.h>
	15	#include <string.h>
	16	#include <unistd.h>
	17	#include "cmdmain.h"
	18	#include "cmdparser.h"
05ddb52c	19	#include "cmdhf14a.h"
05ddb52c	20	#include "ui.h"
48ece4a7	21	#include "mifare.h"
ad939de5	22	#include "comms.h"
48ece4a7	23	#include "iso14443crc.h"
	24	#include "protocols.h"
	25
7624e8b2	26	#define TOPAZ_STATIC_MEMORY (0x0f * 8) // 15 blocks with 8 Bytes each
6e6f1099	27
7624e8b2	28	// a struct to describe a memory area which contains lock bits and the corresponding lockable memory area
6e6f1099	29	typedef struct dynamic_lock_area {
6e6f1099	30	struct dynamic_lock_area *next;
7624e8b2	31	uint16_t byte_offset; // the address of the lock bits
6e6f1099	32	uint16_t size_in_bits;
7624e8b2	33	uint16_t first_locked_byte; // the address of the lockable area
6e6f1099	34	uint16_t bytes_locked_per_bit;
	35	} dynamic_lock_area_t;
	36
48ece4a7	37
c5847ae8	38	static struct {
	39	uint8_t HR01[2];
	40	uint8_t uid[7];
7624e8b2	41	uint16_t size;
	42	uint8_t data_blocks[TOPAZ_STATIC_MEMORY/8][8]; // this memory is always there
	43	uint8_t *dynamic_memory; // this memory can be there
	44	dynamic_lock_area_t *dynamic_lock_areas; // lock area descriptors
c5847ae8	45	} topaz_tag;
48ece4a7	46
de15fc5f	47
48ece4a7	48	static void topaz_switch_on_field(void)
	49	{
	50	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_CONNECT \| ISO14A_NO_SELECT \| ISO14A_NO_DISCONNECT \| ISO14A_TOPAZMODE, 0, 0}};
	51	SendCommand(&c);
48ece4a7	52	}
	53
	54
	55	static void topaz_switch_off_field(void)
	56	{
	57	UsbCommand c = {CMD_READER_ISO_14443a, {0, 0, 0}};
	58	SendCommand(&c);
48ece4a7	59	}
	60
	61
7624e8b2	62	// send a raw topaz command, returns the length of the response (0 in case of error)
de15fc5f	63	static int topaz_send_cmd_raw(uint8_t cmd, uint8_t len, uint8_t response)
48ece4a7	64	{
	65	UsbCommand c = {CMD_READER_ISO_14443a, {ISO14A_RAW \| ISO14A_NO_DISCONNECT \| ISO14A_TOPAZMODE, len, 0}};
	66	memcpy(c.d.asBytes, cmd, len);
	67	SendCommand(&c);
	68
	69	UsbCommand resp;
	70	WaitForResponse(CMD_ACK, &resp);
	71
de15fc5f	72	if (resp.arg[0] > 0) {
	73	memcpy(response, resp.d.asBytes, resp.arg[0]);
	74	}
	75
	76	return resp.arg[0];
48ece4a7	77	}
	78
	79
7624e8b2	80	// calculate CRC bytes and send topaz command, returns the length of the response (0 in case of error)
de15fc5f	81	static int topaz_send_cmd(uint8_t cmd, uint8_t len, uint8_t response)
48ece4a7	82	{
	83	if (len > 1) {
	84	uint8_t first, second;
de15fc5f	85	ComputeCrc14443(CRC_14443_B, cmd, len-2, &first, &second);
	86	cmd[len-2] = first;
	87	cmd[len-1] = second;
48ece4a7	88	}
48ece4a7	89
de15fc5f	90	return topaz_send_cmd_raw(cmd, len, response);
48ece4a7	91	}
	92
	93
7624e8b2	94	// select a topaz tag. Send WUPA and RID.
de15fc5f	95	static int topaz_select(uint8_t atqa, uint8_t rid_response)
48ece4a7	96	{
48ece4a7	97	// ToDo: implement anticollision
de15fc5f	98
48ece4a7	99	uint8_t wupa_cmd[] = {TOPAZ_WUPA};
de15fc5f	100	uint8_t rid_cmd[] = {TOPAZ_RID, 0, 0, 0, 0, 0, 0, 0, 0};
de15fc5f	101
48ece4a7	102	topaz_switch_on_field();
de15fc5f	103
	104	if (!topaz_send_cmd(wupa_cmd, sizeof(wupa_cmd), atqa)) {
	105	topaz_switch_off_field();
	106	return -1; // WUPA failed
	107	}
	108
	109	if (!topaz_send_cmd(rid_cmd, sizeof(rid_cmd), rid_response)) {
	110	topaz_switch_off_field();
	111	return -2; // RID failed
	112	}
	113
	114	return 0; // OK
	115	}
	116
	117
7624e8b2	118	// read all of the static memory of a selected Topaz tag.
c5847ae8	119	static int topaz_rall(uint8_t uid, uint8_t response)
de15fc5f	120	{
	121	uint8_t rall_cmd[] = {TOPAZ_RALL, 0, 0, 0, 0, 0, 0, 0, 0};
	122
	123	memcpy(&rall_cmd[3], uid, 4);
c5847ae8	124	if (!topaz_send_cmd(rall_cmd, sizeof(rall_cmd), response)) {
de15fc5f	125	topaz_switch_off_field();
	126	return -1; // RALL failed
	127	}
	128
	129	return 0;
48ece4a7	130	}
48ece4a7	131
05ddb52c	132
7624e8b2	133	// read a block (8 Bytes) of a selected Topaz tag.
	134	static int topaz_read_block(uint8_t uid, uint8_t blockno, uint8_t block_data)
	135	{
	136	uint8_t read8_cmd[] = {TOPAZ_READ8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	137	uint8_t read8_response[11];
	138
	139	read8_cmd[1] = blockno;
	140	memcpy(&read8_cmd[10], uid, 4);
	141	if (!topaz_send_cmd(read8_cmd, sizeof(read8_cmd), read8_response)) {
	142	topaz_switch_off_field();
	143	return -1; // READ8 failed
	144	}
	145
	146	memcpy(block_data, &read8_response[1], 8);
	147
	148	return 0;
	149	}
	150
	151
	152	// read a segment (16 blocks = 128 Bytes) of a selected Topaz tag. Works only for tags with dynamic memory.
	153	static int topaz_read_segment(uint8_t uid, uint8_t segno, uint8_t segment_data)
	154	{
	155	uint8_t rseg_cmd[] = {TOPAZ_RSEG, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
	156	uint8_t rseg_response[131];
	157
	158	rseg_cmd[1] = segno << 4;
	159	memcpy(&rseg_cmd[10], uid, 4);
	160	if (!topaz_send_cmd(rseg_cmd, sizeof(rseg_cmd), rseg_response)) {
	161	topaz_switch_off_field();
	162	return -1; // RSEG failed
	163	}
	164
	165	memcpy(segment_data, &rseg_response[1], 128);
	166
	167	return 0;
	168	}
	169
	170
	171	// search for the lock area descriptor for the lockable area including byteno
6e6f1099	172	static dynamic_lock_area_t *get_dynamic_lock_area(uint16_t byteno)
	173	{
	174	dynamic_lock_area_t *lock_area;
	175
	176	lock_area = topaz_tag.dynamic_lock_areas;
	177
	178	while (lock_area != NULL) {
	179	if (byteno < lock_area->first_locked_byte) {
	180	lock_area = lock_area->next;
	181	} else {
	182	return lock_area;
	183	}
	184	}
	185
	186	return NULL;
	187	}
	188
	189
7624e8b2	190	// check if a memory byte is locked.
6e6f1099	191	static bool topaz_byte_is_locked(uint16_t byteno)
de15fc5f	192	{
6e6f1099	193	uint8_t *lockbits;
	194	uint16_t locked_bytes_per_bit;
	195	dynamic_lock_area_t *lock_area;
	196
	197	if (byteno < TOPAZ_STATIC_MEMORY) {
	198	lockbits = &topaz_tag.data_blocks[0x0e][0];
	199	locked_bytes_per_bit = 8;
	200	} else {
	201	lock_area = get_dynamic_lock_area(byteno);
	202	if (lock_area == NULL) {
	203	return false;
7624e8b2	204	} else {
	205	lockbits = &topaz_tag.dynamic_memory[lock_area->byte_offset - TOPAZ_STATIC_MEMORY];
	206	locked_bytes_per_bit = lock_area->bytes_locked_per_bit;
	207	byteno = byteno - lock_area->first_locked_byte;
6e6f1099	208	}
6e6f1099	209	}
	210
	211	uint16_t blockno = byteno / locked_bytes_per_bit;
7624e8b2	212	if(lockbits[blockno/8] & (0x01 << (blockno % 8))) {
de15fc5f	213	return true;
	214	} else {
	215	return false;
	216	}
	217	}
	218
	219
7624e8b2	220	// read and print the Capability Container
de15fc5f	221	static int topaz_print_CC(uint8_t *data)
	222	{
	223	if(data[0] != 0xe1) {
7624e8b2	224	topaz_tag.size = TOPAZ_STATIC_MEMORY;
de15fc5f	225	return -1; // no NDEF message
	226	}
	227
	228	PrintAndLog("Capability Container: %02x %02x %02x %02x", data[0], data[1], data[2], data[3]);
	229	PrintAndLog(" %02x: NDEF Magic Number", data[0]);
	230	PrintAndLog(" %02x: version %d.%d supported by tag", data[1], (data[1] & 0xF0) >> 4, data[1] & 0x0f);
6e6f1099	231	uint16_t memsize = (data[2] + 1) * 8;
7624e8b2	232	topaz_tag.size = memsize;
6e6f1099	233	topaz_tag.dynamic_memory = malloc(memsize - TOPAZ_STATIC_MEMORY);
6e6f1099	234	PrintAndLog(" %02x: Physical Memory Size of this tag: %d bytes", data[2], memsize);
de15fc5f	235	PrintAndLog(" %02x: %s / %s", data[3],
	236	(data[3] & 0xF0) ? "(RFU)" : "Read access granted without any security",
	237	(data[3] & 0x0F)==0 ? "Write access granted without any security" : (data[3] & 0x0F)==0x0F ? "No write access granted at all" : "(RFU)");
	238	return 0;
	239	}
	240
	241
7624e8b2	242	// return type, length and value of a TLV, starting at memory position *TLV_ptr
7624e8b2	243	static void get_TLV(uint8_t *TLV_ptr, uint8_t TLV_type, uint16_t TLV_length, uint8_t *TLV_value)
de15fc5f	244	{
7624e8b2	245	*TLV_length = 0;
7624e8b2	246	*TLV_value = NULL;
de15fc5f	247
7624e8b2	248	TLV_type = *TLV_ptr;
de15fc5f	249	*TLV_ptr += 1;
7624e8b2	250	switch (*TLV_type) {
de15fc5f	251	case 0x00: // NULL TLV.
	252	case 0xFE: // Terminator TLV.
	253	break;
	254	case 0x01: // Lock Control TLV
	255	case 0x02: // Reserved Memory TLV
	256	case 0x03: // NDEF message TLV
	257	case 0xFD: // proprietary TLV
7624e8b2	258	TLV_length = *TLV_ptr;
de15fc5f	259	*TLV_ptr += 1;
7624e8b2	260	if (*TLV_length == 0xff) {
7624e8b2	261	TLV_length = *TLV_ptr << 8;
de15fc5f	262	*TLV_ptr += 1;
7624e8b2	263	TLV_length \|= *TLV_ptr;
de15fc5f	264	*TLV_ptr += 1;
de15fc5f	265	}
7624e8b2	266	TLV_value = TLV_ptr;
7624e8b2	267	TLV_ptr += TLV_length;
de15fc5f	268	break;
	269	default: // RFU
	270	break;
	271	}
	272	}
	273
	274
7624e8b2	275	// lock area TLVs contain no information on the start of the respective lockable area. Lockable areas
	276	// do not include the lock bits and reserved memory. We therefore need to adjust the start of the
	277	// respective lockable areas accordingly
	278	static void adjust_lock_areas(uint16_t block_start, uint16_t block_size)
	279	{
	280	dynamic_lock_area_t *lock_area = topaz_tag.dynamic_lock_areas;
	281	while (lock_area != NULL) {
	282	if (lock_area->first_locked_byte <= block_start) {
	283	lock_area->first_locked_byte += block_size;
	284	}
	285	lock_area = lock_area->next;
	286	}
	287	}
	288
	289
	290	// read and print the lock area and reserved memory TLVs
	291	static void topaz_print_control_TLVs(uint8_t *memory)
de15fc5f	292	{
de15fc5f	293	uint8_t *TLV_ptr = memory;
7624e8b2	294	uint8_t TLV_type = 0;
	295	uint16_t TLV_length;
	296	uint8_t *TLV_value;
de15fc5f	297	bool lock_TLV_present = false;
7624e8b2	298	bool reserved_memory_control_TLV_present = false;
7624e8b2	299	uint16_t next_lockable_byte = 0x0f * 8; // first byte after static memory area
de15fc5f	300
	301	while(TLV_ptr != 0x03 && TLV_ptr != 0xFD && *TLV_ptr != 0xFE) {
	302	// all Lock Control TLVs shall be present before the NDEF message TLV, the proprietary TLV (and the Terminator TLV)
7624e8b2	303	get_TLV(&TLV_ptr, &TLV_type, &TLV_length, &TLV_value);
	304	if (TLV_type == 0x01) { // a Lock Control TLV
	305	uint8_t pages_addr = TLV_value[0] >> 4;
	306	uint8_t byte_offset = TLV_value[0] & 0x0f;
	307	uint16_t size_in_bits = TLV_value[1] ? TLV_value[1] : 256;
	308	uint16_t size_in_bytes = (size_in_bits + 7)/8;
	309	uint16_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
	310	uint16_t bytes_locked_per_bit = 1 << (TLV_value[2] >> 4);
	311	uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
6e6f1099	312	PrintAndLog("Lock Area of %d bits at byte offset 0x%04x. Each Lock Bit locks %d bytes.",
de15fc5f	313	size_in_bits,
7624e8b2	314	area_start,
de15fc5f	315	bytes_locked_per_bit);
de15fc5f	316	lock_TLV_present = true;
6e6f1099	317	dynamic_lock_area_t *old = topaz_tag.dynamic_lock_areas;
	318	dynamic_lock_area_t *new = topaz_tag.dynamic_lock_areas;
	319	if (old == NULL) {
	320	new = topaz_tag.dynamic_lock_areas = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
	321	} else {
	322	while(old->next != NULL) {
	323	old = old->next;
	324	}
	325	new = old->next = (dynamic_lock_area_t *)malloc(sizeof(dynamic_lock_area_t));
	326	}
	327	new->next = NULL;
7624e8b2	328	if (area_start <= next_lockable_byte) {
	329	// lock areas are not lockable
	330	next_lockable_byte += size_in_bytes;
	331	}
	332	new->first_locked_byte = next_lockable_byte;
	333	new->byte_offset = area_start;
6e6f1099	334	new->size_in_bits = size_in_bits;
6e6f1099	335	new->bytes_locked_per_bit = bytes_locked_per_bit;
7624e8b2	336	next_lockable_byte += size_in_bits * bytes_locked_per_bit;
	337	}
	338	if (TLV_type == 0x02) { // a Reserved Memory Control TLV
	339	uint8_t pages_addr = TLV_value[0] >> 4;
	340	uint8_t byte_offset = TLV_value[0] & 0x0f;
31a29271	341	uint16_t size_in_bytes = TLV_value[1] ? TLV_value[1] : 256;
7624e8b2	342	uint8_t bytes_per_page = 1 << (TLV_value[2] & 0x0f);
	343	uint16_t area_start = pages_addr * bytes_per_page + byte_offset;
	344	PrintAndLog("Reserved Memory of %d bytes at byte offset 0x%02x.",
	345	size_in_bytes,
	346	area_start);
	347	reserved_memory_control_TLV_present = true;
	348	adjust_lock_areas(area_start, size_in_bytes); // reserved memory areas are not lockable
	349	if (area_start <= next_lockable_byte) {
	350	next_lockable_byte += size_in_bytes;
	351	}
de15fc5f	352	}
	353	}
	354
	355	if (!lock_TLV_present) {
	356	PrintAndLog("(No Lock Control TLV present)");
de15fc5f	357	}
7624e8b2	358
	359	if (!reserved_memory_control_TLV_present) {
	360	PrintAndLog("(No Reserved Memory Control TLV present)");
	361	}
de15fc5f	362	}
	363
	364
7624e8b2	365	// read all of the dynamic memory
7624e8b2	366	static int topaz_read_dynamic_data(void)
de15fc5f	367	{
7624e8b2	368	// first read the remaining block of segment 0
	369	if(topaz_read_block(topaz_tag.uid, 0x0f, &topaz_tag.dynamic_memory[0]) == -1) {
	370	PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
	371	return -1;
	372	}
de15fc5f	373
7624e8b2	374	// read the remaining segments
	375	uint8_t max_segment = topaz_tag.size / 128 - 1;
	376	for(uint8_t segment = 1; segment <= max_segment; segment++) {
	377	if(topaz_read_segment(topaz_tag.uid, segment, &topaz_tag.dynamic_memory[(segment-1)*128+8]) == -1) {
	378	PrintAndLog("Error while reading dynamic memory block %02x. Aborting...", 0x0f);
	379	return -1;
de15fc5f	380	}
	381	}
	382
7624e8b2	383	return 0;
	384	}
	385
	386
	387	// read and print the dynamic memory
	388	static void topaz_print_dynamic_data(void)
	389	{
	390	if (topaz_tag.size > TOPAZ_STATIC_MEMORY) {
	391	PrintAndLog("Dynamic Data blocks:");
	392	if (topaz_read_dynamic_data() == 0) {
	393	PrintAndLog("block# \| offset \| Data \| Locked(y/n)");
	394	char line[80];
	395	for (uint16_t blockno = 0x0f; blockno < topaz_tag.size/8; blockno++) {
	396	uint8_t block_data = &topaz_tag.dynamic_memory[(blockno-0x0f)8];
	397	char lockbits[9];
	398	for (uint16_t j = 0; j < 8; j++) {
	399	sprintf(&line[3*j], "%02x ", block_data[j]);
	400	lockbits[j] = topaz_byte_is_locked(blockno*8+j) ? 'y' : 'n';
	401	}
	402	lockbits[8] = '\0';
	403	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", blockno, blockno*8, line, lockbits);
	404	}
	405	}
de15fc5f	406	}
	407	}
	408
	409
	410	static void topaz_print_lifecycle_state(uint8_t *data)
	411	{
7624e8b2	412	// to be done
de15fc5f	413	}
	414
	415
	416	static void topaz_print_NDEF(uint8_t *data)
	417	{
7624e8b2	418	// to be done.
de15fc5f	419	}
de15fc5f	420
7624e8b2	421
7624e8b2	422	// read a Topaz tag and print some usefull information
05ddb52c	423	int CmdHFTopazReader(const char *Cmd)
05ddb52c	424	{
de15fc5f	425	int status;
	426	uint8_t atqa[2];
	427	uint8_t rid_response[8];
	428	uint8_t *uid_echo = &rid_response[2];
c5847ae8	429	uint8_t rall_response[124];
de15fc5f	430
	431	status = topaz_select(atqa, rid_response);
	432
	433	if (status == -1) {
	434	PrintAndLog("Error: couldn't receive ATQA");
	435	return -1;
	436	}
	437
	438	PrintAndLog("ATQA : %02x %02x", atqa[1], atqa[0]);
	439	if (atqa[1] != 0x0c && atqa[0] != 0x00) {
	440	PrintAndLog("Tag doesn't support the Topaz protocol.");
	441	topaz_switch_off_field();
	442	return -1;
	443	}
	444
	445	if (status == -2) {
	446	PrintAndLog("Error: tag didn't answer to RID");
	447	topaz_switch_off_field();
	448	return -1;
	449	}
	450
c5847ae8	451	topaz_tag.HR01[0] = rid_response[0];
	452	topaz_tag.HR01[1] = rid_response[1];
	453
de15fc5f	454	// ToDo: CRC check
	455	PrintAndLog("HR0 : %02x (%sa Topaz tag (%scapable of carrying a NDEF message), %s memory map)", rid_response[0],
	456	(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
	457	(rid_response[0] & 0xF0) == 0x10 ? "" : "not ",
44964fd1	458	(rid_response[0] & 0x0F) == 0x01 ? "static" : "dynamic");
de15fc5f	459	PrintAndLog("HR1 : %02x", rid_response[1]);
de15fc5f	460
c5847ae8	461	status = topaz_rall(uid_echo, rall_response);
de15fc5f	462
	463	if(status == -1) {
	464	PrintAndLog("Error: tag didn't answer to RALL");
	465	topaz_switch_off_field();
	466	return -1;
	467	}
	468
c5847ae8	469	memcpy(topaz_tag.uid, rall_response+2, 7);
de15fc5f	470	PrintAndLog("UID : %02x %02x %02x %02x %02x %02x %02x",
c5847ae8	471	topaz_tag.uid[6],
	472	topaz_tag.uid[5],
	473	topaz_tag.uid[4],
	474	topaz_tag.uid[3],
	475	topaz_tag.uid[2],
	476	topaz_tag.uid[1],
	477	topaz_tag.uid[0]);
de15fc5f	478	PrintAndLog(" UID[6] (Manufacturer Byte) = %02x, Manufacturer: %s",
c5847ae8	479	topaz_tag.uid[6],
	480	getTagInfo(topaz_tag.uid[6]));
	481
7624e8b2	482	memcpy(topaz_tag.data_blocks, rall_response+2, 0x0f*8);
de15fc5f	483	PrintAndLog("");
de15fc5f	484	PrintAndLog("Static Data blocks 00 to 0c:");
6e6f1099	485	PrintAndLog("block# \| offset \| Data \| Locked(y/n)");
de15fc5f	486	char line[80];
de15fc5f	487	for (uint16_t i = 0; i <= 0x0c; i++) {
7624e8b2	488	char lockbits[9];
de15fc5f	489	for (uint16_t j = 0; j < 8; j++) {
c5847ae8	490	sprintf(&line[3j], "%02x ", topaz_tag.data_blocks[i][j] /rall_response[2 + 8i + j]/);
7624e8b2	491	lockbits[j] = topaz_byte_is_locked(i*8+j) ? 'y' : 'n';
de15fc5f	492	}
7624e8b2	493	lockbits[8] = '\0';
7624e8b2	494	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", i, i*8, line, lockbits);
de15fc5f	495	}
	496
	497	PrintAndLog("");
	498	PrintAndLog("Static Reserved block 0d:");
	499	for (uint16_t j = 0; j < 8; j++) {
c5847ae8	500	sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0d][j]);
de15fc5f	501	}
6e6f1099	502	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", 0x0d, 0x0d*8, line, "n/a");
de15fc5f	503
de15fc5f	504	PrintAndLog("");
c5847ae8	505	PrintAndLog("Static Lockbits and OTP Bytes:");
de15fc5f	506	for (uint16_t j = 0; j < 8; j++) {
c5847ae8	507	sprintf(&line[3*j], "%02x ", topaz_tag.data_blocks[0x0e][j]);
de15fc5f	508	}
6e6f1099	509	PrintAndLog(" 0x%02x \| 0x%04x \| %s\| %-3s", 0x0e, 0x0e*8, line, "n/a");
de15fc5f	510
	511	PrintAndLog("");
	512
c5847ae8	513	status = topaz_print_CC(&topaz_tag.data_blocks[1][0]);
de15fc5f	514
de15fc5f	515	if (status == -1) {
7624e8b2	516	PrintAndLog("No NDEF message data present");
de15fc5f	517	topaz_switch_off_field();
	518	return 0;
	519	}
	520
	521	PrintAndLog("");
7624e8b2	522	topaz_print_control_TLVs(&topaz_tag.data_blocks[1][4]);
de15fc5f	523
de15fc5f	524	PrintAndLog("");
7624e8b2	525	topaz_print_dynamic_data();
7624e8b2	526
c5847ae8	527	topaz_print_lifecycle_state(&topaz_tag.data_blocks[1][0]);
de15fc5f	528
c5847ae8	529	topaz_print_NDEF(&topaz_tag.data_blocks[1][0]);
de15fc5f	530
de15fc5f	531	topaz_switch_off_field();
05ddb52c	532	return 0;
	533	}
	534
	535
05ddb52c	536	int CmdHFTopazCmdRaw(const char *Cmd)
05ddb52c	537	{
7624e8b2	538	PrintAndLog("not yet implemented. Use hf 14 raw with option -T.");
05ddb52c	539	return 0;
	540	}
	541
	542
	543	static int CmdHelp(const char *Cmd);
	544
	545
	546	static command_t CommandTable[] =
	547	{
	548	{"help", CmdHelp, 1, "This help"},
	549	{"reader", CmdHFTopazReader, 0, "Act like a Topaz reader"},
05ddb52c	550	{"snoop", CmdHF14ASnoop, 0, "Eavesdrop a Topaz reader-tag communication"},
	551	{"raw", CmdHFTopazCmdRaw, 0, "Send raw hex data to tag"},
	552	{NULL, NULL, 0, NULL}
	553	};
	554
	555
	556	int CmdHFTopaz(const char *Cmd) {
44964fd1	557	(void)WaitForResponseTimeout(CMD_ACK,NULL,100);
05ddb52c	558	CmdsParse(CommandTable, Cmd);
	559	return 0;
	560	}
	561
7624e8b2	562
05ddb52c	563	static int CmdHelp(const char *Cmd)
	564	{
	565	CmdsHelp(CommandTable);
	566	return 0;
	567	}
	568
	569